All-solid-state pH composite electrode device and preparation method therefor

Abstract

The invention discloses an all-solid-state pH composite electrode device and a preparation method therefor, belongs to the technical field of a pH value sensor, and solves the problems that a traditional reference electrode is poor in stability, short in service life and the like. The all-solid-state pH composite electrode device comprises an electrode protecting pipe. A pH composite electrode which is fixed with a high-temperature-resistant glue is arranged into the electrode protecting pipe, and the pH composite electrode comprises a pH response electrode and a reference electrode. The pH response electrode and the reference electrode are connected with a copper wire through a first silver wire and a second silver wire respectively. The device has the characteristics of being large in the mechanical strength, high in the response speed, high in the stability and the like; the device can be applied to high-temperature and high-pressure systems, industrial strong stirring systems, pH measurement for deep water and deep sea, and the like, and can improve the accuracy and the service life of the electrode to the pH measurement. The preparation method is simple and feasible, suitablefor a metal / metal oxide pH electrode, a solid pH electrode and the like, good in the practicability and wide in the range.

Description

technical field [0001] The invention belongs to the technical field of pH sensors, in particular to an all-solid-state pH composite electrode device and a preparation method thereof. Background technique [0002] The traditional pH composite glass electrode is the most widely used sensor for measuring pH. However, the glass electrode has problems such as high impedance and easy breakage of the glass material, and it is difficult to measure pH in complex environments (such as deep water, deep sea, high temperature and high pressure systems, and strong stirring systems in industrial production), which have led to pH glass electrodes. The scope of application and performance are limited. [0003] The traditional reference electrode (such as calomel electrode, silver / silver chloride electrode) is a saturated potassium chloride solution in the tube, the liquid will boil at high temperature, and the stability of the electrode will be destroyed; The silver wire of the plating lay...

AI Technical Summary

Problems solved by technology

However, the glass electrode has problems such as high impedance and easy breakage of the glass material, and it is difficult to measure pH in complex environments (such as deep water, deep sea, high temperature and high pressure systems, and strong stirring systems in industrial production), which have led to pH glass electrodes. Limited range of application and performance

[0003] The traditional reference electrode (such as calomel electrode, silver / silver chloride electrode) is a saturated potassium chloride solution in the tube, the liquid will boil at high temperature, and the stability of the electrode will be destroyed; The silver wire of the coating is used as a reference, the electrode is easily polluted, the coating is also easy to fall off during use, the service life is short, and the stability is poor, which in turn affects the accuracy of the pH electrode measurement

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